Improvement in sewing-machine



. 4 Sheets-Sheet 1 N. Bi STOOPS & J..J. SIBLEY.

Sewing Machine.

No. 93,921. Patented Aug. 17, 1869 Wa n/eases IL PETEIG. Fhmoliuwgraphu. Washing D. C.

Sewing Machine.-

Patented Aug. 17, 1869.

N. PETERS. Pnotn-Lhhc n her. Wahingtou. D. C.

NESBIT" D. STOOPS, OE PHILADELPHIA, PENNSYLVANIA, AND .TOHN J. SI'BLEY, OF NEW YORK, N. Y.

Letters Patent No. 93,921, dated August 17, 1869.

IMPROVEMENT IN SEWING-MACHINE.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that we, Nnsnrr'r D. STOQPS, of the city and county of Philadelphia, State of Pennsylvania, and J GEN J. SIBLEY, of the city, county, and State of New York, have invented new and useful Improvements in Sewing-Machines; and we hereby declareithat the following is a full, clear, and exact description thereof, reference being had to the accompanyingdrawings, making a part of this specification, and th letters of reference marked thereon, in which the same letter represents the same t-llirg in each figure.

Figure 1 is a side elevation of a shuttlelsewingamachine containing our improvements.

Figure 2 is a cut section thereof.

Figure 3, a bottom view thereof.

Figure 4,'an end rout-view thereof.-

Figure 5, a cut section of the front end thereof.

Figure 6 is the trannnel-shuttle driver.

Figure 7 a back view thereof.

Figure 8, a cross-section of the take-up 'fi' I Our improvements consist in combiniugrlevices for obviating the objections to driving the shuttle either by cams or direct cranks, the former being expensive, noisy, the parts particularly subject to wear, and the movemeutslow; the latter failing to give the requi site relative motion to the shuttle for fine sewing, also for timing the slacking of the needle thread, according to the thickness ofthe material. l

A represents the inner face of the slotted crankplate.

B, the slot therein.

C, the crank-slide that works in slot B. l

1), the curved slot in the outer face of the crankplate. 7 A

E, the crank. i

F, the crank-pin. I

G, the trundle that guides crank If. in slot 1),

H, the slmttle-conueeting-rod.

I, the heart-shaped needle-carrier.

J, the trundle that moves it.

K, a plate, loosely connected with and projecting laterally from the presser-rorlf I L, the recess in the needle-bar. H

M, the nipper-sprlng. i

N, the nipper-disks.

O, the upright shait.

I, the shoulder of the presser-foot bar, 1'. I The operation of these parts is as fol] w l A, being permanently ailixed to the-0r in a; upright shatt O, is revolved thereby, and, crank-slideQ- 'avels in slot B the length of crank I), which at the, ,same time has revolved on pin- F, guided by trundle G in slot D, and by pin F, secured both to crank E and connect ing-rod H, and caused rod H to reciprocate intermittently. The'effect and advantages of which are, the

shuttle is thrown quickly through the loop, and held at rest until the needle has completed its upward movement, thus tightening both threads simultaneously.

When an ordinary crank is employed, the shuttle begins to retreat before the upward movement of the needle is complete, leaving the under thread slack, to be drawn up throughthe material by the needle.

The quick passage of the shuttle through the loop obviates the necessity of keeping the needle long at rest, and allows the loop of upper tln-ead to come off the heel of the shuttle without lifting it or straining the'thread, as is the case when the needle commences to rise before the shuttle is through the loop.

The descending needle-bar brings the upper incline of its recess L in contact with the plate K, and presses it outward, and against a pin in spn'ng M, opening disks N J, thus releasing the needle-thread, which has been confined between them during the descent of the needle, at the precisemoment the eye of the needle reaches the material, so that there may then be slack thread to form the loop for the sh uttle-point to enter.

The plate K rests on shoulder P of the presser-bar, and as the material beneath the presscr-ioot is thick or thin, the plate will be raised or lowered, and will, consequently, he acted on by the inclinein the needlebar, to open the disks just when the macdle-eye reaches the material.

\Vhat we claim, and desire to secure by Letters Patcut, isv 1. The combination, with the needle, operated by the heart-shaped cam, of the shuttle, operated by the tranunel-mechanisrn, all constructed substantially as and for the purpose described.

2-. The combination, with the plate K, connected with the presser-rod, as described, of the needle-bar and tln'ead-controlling disks, to release thethread as the eye of the needle reaches the cloth, as described.

3. The combination of the shuttle and its trammeldevice, the needle, operated by the heart-shaped carrier, and the tln'ead-controlling disks, governed to their time of operation by the presser-rod, when all act together, substantially as described.

NESBITT D. STOOPS. JOHN J. SIBLEY. \Vitnesses:

J. GORDON, H. OovnRr. 

